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Showing 1 to 2 of 2 for “"umbral dots"”.
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A near-infrared filter system and study of solar umbral dots at 1.6 µm
… the first observations and studies of umbral dots at 1.56 um are made. The image data are obtained with a 50 [Angstrom] wide interference filter centered at 1.56um with the nearinfrared InGaAs camera as the detector. The image data include two sequences of images of a complicated …
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Application of adaptive optics to the spectroscopic investigation of small-scale solar structures
We study bright points, umbral dots and the G-band using a two-dimensional spectrometer and an Adaptive Optics system, which allows us to record high-resolution dopplergrams and residual intensity images. We find evidence that bright points are smaller than 120 km in diameter. Bright points are …